Today, me and my dad were in a sort of prank war. I decided to get him back for one last time tonight, so I hid in his office to scare him. This would have been okay had I not caught him watching porn. I had to hide for an hour. FML

My first thought was "why didn't you jump out of hiding as soon as it came on rather than enduring the 'full session'?" Then I realized that you probably froze. An that it might have been, um, "too late".

If the choices were A) Jump out straight away explain the situation or B) sit in the same room as a porn watching, masterbating (assuming) father and you opted for the latter... Sorry OP but you're an idiot and YDI